package authority.util;

import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

/**
 * 导入excel帮助类
 */
public class ImprotExcelUtil {
	 private final static String excel2003L =".xls";    //2003- 版本的excel    
	    private final static String excel2007U =".xlsx";   //2007+ 版本的excel    
	    /*************************************文件上传****************************/  
	    public static  List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{    
	        List<List<Object>> list = null;    
	            
	        //创建Excel工作薄    
	        Workbook work = getWorkbook(in,fileName);    
	        if(null == work){    
	            throw new Exception("创建Excel工作薄为空！");    
	        }    
	        Sheet sheet = null;
			Row row = null;
			Cell cell = null;

			list = new ArrayList<List<Object>>();
	        //遍历Excel中所有的sheet    
	        for (int i = 0; i < work.getNumberOfSheets(); i++) {    
	            sheet = work.getSheetAt(i);    
	            if(sheet==null){continue;}    
	                
	            //遍历当前sheet中的所有行    
	            for (int j = sheet.getFirstRowNum(); j < sheet.getLastRowNum(); j++) {    
	                row = sheet.getRow(j);    
	                if(row==null||row.getFirstCellNum()==j){continue;}    
	                    
	                //遍历所有的列    
	                List<Object> li = new ArrayList<Object>();    
	                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {    
	                    cell = row.getCell(y);         
	                    li.add(getCellValue(cell));    
	                }    
	                list.add(li);    
	            }    
	        }    
//	        work.close();    
	        return list;    
	    }    
	        
	    /**  
	     * 描述：根据文件后缀，自适应上传文件的版本   
	     * @param inStr,fileName  
	     * @return  
	     * @throws Exception  
	     */    
	    public static  Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{    
	        Workbook wb = null;    
	        String fileType = fileName.substring(fileName.lastIndexOf("."));    
	        if(excel2003L.equals(fileType)){    
	            wb = new HSSFWorkbook(inStr);  //2003-    
	        }else if(excel2007U.equals(fileType)){    
	            wb = new XSSFWorkbook(inStr);  //2007+    
	        }else{    
	            throw new Exception("解析的文件格式有误！");    
	        }    
	        return wb;    
	    }    
	    
	    /**  
	     * 描述：对表格中数值进行格式化  
	     * @param cell  
	     * @return  
	     */    
	    public static  Object getCellValue(Cell cell){    
	        Object value = null;    
	        DecimalFormat df = new DecimalFormat("0");  //格式化number String字符    
	        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");  //日期格式化    
	        DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字    
	            
	        switch (cell.getCellType()) {    
	        case Cell.CELL_TYPE_STRING:    
	            value = cell.getRichStringCellValue().getString();    
	            break;    
	        case Cell.CELL_TYPE_NUMERIC:    
	            if("General".equals(cell.getCellStyle().getDataFormatString())){    
	                value = df.format(cell.getNumericCellValue());    
	            }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){    
	                value = sdf.format(cell.getDateCellValue());    
	            }else{    
	                value = df2.format(cell.getNumericCellValue());    
	            }    
	            break;    
	        case Cell.CELL_TYPE_BOOLEAN:    
	            value = cell.getBooleanCellValue();    
	            break;    
	        case Cell.CELL_TYPE_BLANK:    
	            value = "";    
	            break;    
	        default:    
	            break;    
	        }    
	        return value;    
	    }  

}
